Chunk and excel Laravel - excel

Question

guys.
I need help with this code. I need to download an excel with arround 550000 records. So i was wondering how can i use eloquent with chunk, skip and limit and get to make the excel or do something better than this. I started to making some code to save excel in a folder and then download in a zip, but i cant make works chunk and get.
I had problems with time execution and memory limit, but thats no more a problem.
This is my code.
$x=1;
for ($i=0; $i<=550000; $i=$i+15000) {
$personas="";
$personas = DB::table("cat_personas as c")->select("c.*","s.seccion","ca.casilla")
->leftJoin("cat_casillas as ca","c.cat_casilla_id","=","ca.id")
->join("cat_seccion as s","c.cat_seccion_id","=","s.id")
->where($filtros)
->whereRaw("c.id NOT IN ( SELECT cruzado FROM registro_persona )")
->whereRaw($whereCadena)
->orderby('c.consecutivo')
->orderby('c.apellido_paterno')
->orderby('c.apellido_materno')
->orderby('c.nombre')
->orderby('s.seccion')
->orderby('ca.casilla')
->skip($i)->limit(15000);
//$personas=$personas->get();
dd($personas->count());
if($personas->count()>0){
$spreadsheet = new Spreadsheet();
$r=1;
$sheet = $spreadsheet->getActiveSheet()
->setCellValue('A'.$r, '#')
->setCellValue('B'.$r, 'NOMBRE')
->setCellValue('C'.$r, 'APELLIDO PATERNO')
->setCellValue('D'.$r, 'APELLIDO MATERNO')
->setCellValue('E'.$r, 'SECCION')
->setCellValue('F'.$r, 'CASILLA')
->setCellValue('G'.$r, 'CONSECUTIVO');
$r++;
$personas->chunk(5000, function($personas) use (&$spreadsheet,&$r,&$sheet) {
$c=1;
//dd($personas->count());
foreach ($personas as $key) {
$sheet = $spreadsheet->getActiveSheet()
->setCellValue('A'.$r, $c)
->setCellValue('B'.$r, $key->nombre)
->setCellValue('C'.$r, $key->apellido_paterno)
->set`enter code here`CellValue('D'.$r, $key->apellido_materno)
->setCellValue('E'.$r, $key->seccion)
->setCellValue('F'.$r, $key->casilla)
->setCellValue('G'.$r, $key->consecutivo);
$r++;
$c++;
}
});
$writer = new Xlsx($spreadsheet);
//header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
//header('Content-Disposition: attachment; filename="personas.xlsx"');
$writer->save($path."/personas$x.xlsx");
$x++;
}
}

Answer 1

You can use chunk() this way.
$personas = DB::table("cat_personas as c")->select("c.*","s.seccion","ca.casilla")
->leftJoin("cat_casillas as ca","c.cat_casilla_id","=","ca.id")
->join("cat_seccion as s","c.cat_seccion_id","=","s.id")
->where($filtros)
->whereRaw("c.id NOT IN ( SELECT cruzado FROM registro_persona )")
->whereRaw($whereCadena)
->orderby('c.consecutivo')
->orderby('c.apellido_paterno')
->orderby('c.apellido_materno')
->orderby('c.nombre')
->orderby('s.seccion')
->orderby('ca.casilla');
$spreadsheet = new Spreadsheet();
$r = 1;
$sheet = $spreadsheet->getActiveSheet()
->setCellValue('A'.$r, '#')
->setCellValue('B'.$r, 'NOMBRE')
->setCellValue('C'.$r, 'APELLIDO PATERNO')
->setCellValue('D'.$r, 'APELLIDO MATERNO')
->setCellValue('E'.$r, 'SECCION')
->setCellValue('F'.$r, 'CASILLA')
->setCellValue('G'.$r, 'CONSECUTIVO');
$r++;
$c = 1;
$personas->chunk(500, function($personae) use ($spreadsheet, $r, $c) {
foreach ($personae as $persona) {
$spreadsheet->getActiveSheet()
->setCellValue('A'.$r, $c)
->setCellValue('B'.$r, $persona->nombre)
->setCellValue('C'.$r, $persona->apellido_paterno)
->setCellValue('D'.$r, $persona->apellido_materno)
->setCellValue('E'.$r, $persona->seccion)
->setCellValue('F'.$r, $persona->casilla)
->setCellValue('G'.$r, $persona->consecutivo);
$r++;
$c++;
}
});
$writer = new Xlsx($spreadsheet);
$writer->save($path . "/personas.xlsx");
There might be an issue with the total size of the spreadsheet, but if so, this should be a good start towards finding that solution.
PS - This is untested.